JMIR Publications

ABSTRACT

Background:

Responsive web applications are eHealth tools that operate on any internet-enabled device across all browsers. Psychometrically valid assessment tools are essential for effectively evaluating these applications, yet no validated scale exists for assessing their usability in Mexico.

Objective:

To adapt the mHealth App Usability Questionnaire (MAUQ) for responsive web application assessment in Mexico and validate adapted Mx-MAUQ content, construct validity, internal consistency, and its ability to distinguish between patient subgroups.

Methods:

We conducted a psychometric validation study of Mx-MAUQ with women aged 20 to 75 diagnosed with stage I-III breast cancer who had begun neoadjuvant or adjuvant treatment within the last six weeks. The study involved translating and adapting the MAUQ while evaluating its content through expert panels and cognitive interviews and assessing Mx-MAUQ construct validity through exploratory factor analysis (EFA), internal consistency via Cronbach’s alpha and Mx-MAUQ’s capacity to distinguish between subgroups of breast cancer patients using the Wilcoxon rank sum test.

Results:

A total of 210 women participated, with 75.2% aged 60 or younger and 64.3% having a high school education. The expert panel granted all items a CVI above 0.7, confirming clarity through cognitive interviews. EFA identified two factors explaining 91.6% of the variance and retaining all items. The overall Cronbach’s alpha was 0.97. Women with higher education levels scored significantly higher for both factors, as well as the overall Mx-MAUQ score than those with lower educational attainment.

Conclusions:

Mx-MAUQ has shown high reliability and validity, making it a suitable tool for assessing the usability of interactive web-based eHealth applications for women with breast cancer in Mexico.